/mandos/trunk

To get this branch, use:
bzr branch http://bzr.recompile.se/loggerhead/mandos/trunk

« back to all changes in this revision

Viewing changes to dracut-module/password-agent.c

  • Committer: teddy at recompile
  • Date: 2020-02-05 20:32:33 UTC
  • Revision ID: teddy@recompile.se-20200205203233-450ojm36jseglq4m
Server: Stagger checker runs when creating clients

To avoid checkers for all clients all running at the same time
periodically, schedule every initially scheduled future checker to run
at a time in the future a random amount of the interval, from the
current time.

* mandos (Client.init_checker): Schedule the first scheduled future
  run of a checker to be a randomly chosen amount of this client's
  "interval" (instead of a full interval).

Show diffs side-by-side

added added

removed removed

Lines of Context:
2
2
/*
3
3
 * Mandos password agent - Simple password agent to run Mandos client
4
4
 *
5
 
 * Copyright © 2019-2020 Teddy Hogeborn
6
 
 * Copyright © 2019-2020 Björn Påhlsson
 
5
 * Copyright © 2019 Teddy Hogeborn
 
6
 * Copyright © 2019 Björn Påhlsson
7
7
 * 
8
8
 * This file is part of Mandos.
9
9
 * 
49
49
#include <sysexits.h>           /* EX_USAGE, EX_OSERR, EX_OSFILE */
50
50
#include <errno.h>              /* errno, error_t, EACCES,
51
51
                                   ENAMETOOLONG, ENOENT, ENOTDIR,
52
 
                                   ENOMEM, EEXIST, ECHILD, EPERM,
 
52
                                   EEXIST, ECHILD, EPERM, ENOMEM,
53
53
                                   EAGAIN, EINTR, ENOBUFS, EADDRINUSE,
54
54
                                   ECONNREFUSED, ECONNRESET,
55
55
                                   ETOOMANYREFS, EMSGSIZE, EBADF,
73
73
                                   ARGP_ERR_UNKNOWN, ARGP_KEY_ARGS,
74
74
                                   struct argp, argp_parse(),
75
75
                                   ARGP_NO_EXIT */
76
 
#include <stdint.h>             /* SIZE_MAX */
77
76
#include <unistd.h>             /* uid_t, gid_t, close(), pipe2(),
78
77
                                   fork(), _exit(), dup2(),
79
78
                                   STDOUT_FILENO, setresgid(),
96
95
                                   IN_EXCL_UNLINK, IN_ONLYDIR,
97
96
                                   struct inotify_event */
98
97
#include <fnmatch.h>            /* fnmatch(), FNM_FILE_NAME */
99
 
#include <stdio.h>              /* asprintf(), FILE, stderr, fopen(),
100
 
                                   fclose(), getline(), sscanf(),
101
 
                                   feof(), ferror(), rename(),
102
 
                                   fdopen(), fprintf(), fscanf() */
 
98
#include <stdio.h>              /* asprintf(), FILE, fopen(),
 
99
                                   getline(), sscanf(), feof(),
 
100
                                   ferror(), fclose(), stderr,
 
101
                                   rename(), fdopen(), fprintf(),
 
102
                                   fscanf() */
103
103
#include <glib.h>    /* GKeyFile, g_key_file_free(), g_key_file_new(),
104
104
                        GError, g_key_file_load_from_file(),
105
105
                        G_KEY_FILE_NONE, TRUE, G_FILE_ERROR_NOENT,
651
651
 
652
652
__attribute__((nonnull, warn_unused_result))
653
653
bool add_to_queue(task_queue *const queue, const task_context task){
654
 
  if((queue->length + 1) > (SIZE_MAX / sizeof(task_context))){
655
 
    /* overflow */
656
 
    error(0, ENOMEM, "Failed to allocate %" PRIuMAX
657
 
          " tasks for queue->tasks", (uintmax_t)(queue->length + 1));
658
 
    errno = ENOMEM;
659
 
    return false;
660
 
  }
661
654
  const size_t needed_size = sizeof(task_context)*(queue->length + 1);
662
655
  if(needed_size > (queue->allocated)){
663
656
    task_context *const new_tasks = realloc(queue->tasks,
868
861
  }
869
862
  close(pipefds[1]);
870
863
 
871
 
  if(pid == -1){
872
 
    error(0, errno, "Failed to fork()");
873
 
    close(pipefds[0]);
874
 
    return false;
875
 
  }
876
 
 
877
864
  if(not add_to_queue(queue, (task_context){
878
865
        .func=wait_for_mandos_client_exit,
879
866
        .pid=pid,
1897
1884
  g_assert_true(queue->tasks[0].func == dummy_func);
1898
1885
}
1899
1886
 
1900
 
static void test_add_to_queue_overflow(__attribute__((unused))
1901
 
                                       test_fixture *fixture,
1902
 
                                       __attribute__((unused))
1903
 
                                       gconstpointer user_data){
1904
 
  __attribute__((cleanup(cleanup_queue)))
1905
 
    task_queue *queue = create_queue();
1906
 
  g_assert_nonnull(queue);
1907
 
  g_assert_true(queue->length == 0);
1908
 
  queue->length = SIZE_MAX / sizeof(task_context); /* fake max size */
1909
 
 
1910
 
  FILE *real_stderr = stderr;
1911
 
  FILE *devnull = fopen("/dev/null", "we");
1912
 
  g_assert_nonnull(devnull);
1913
 
  stderr = devnull;
1914
 
  const bool ret = add_to_queue(queue,
1915
 
                                (task_context){ .func=dummy_func });
1916
 
  g_assert_true(errno == ENOMEM);
1917
 
  g_assert_false(ret);
1918
 
  stderr = real_stderr;
1919
 
  g_assert_cmpint(fclose(devnull), ==, 0);
1920
 
  queue->length = 0;            /* Restore real size */
1921
 
}
1922
 
 
1923
1887
static void dummy_func(__attribute__((unused))
1924
1888
                       const task_context task,
1925
1889
                       __attribute__((unused))
2196
2160
    }
2197
2161
    exit(EXIT_SUCCESS);
2198
2162
  }
2199
 
  if(pid == -1){
2200
 
    error(EXIT_FAILURE, errno, "Failed to fork()");
2201
 
  }
2202
 
 
2203
2163
  int status;
2204
2164
  waitpid(pid, &status, 0);
2205
2165
  if(WIFEXITED(status) and (WEXITSTATUS(status) == EXIT_SUCCESS)){
5958
5918
                                           test_fixture *fixture,
5959
5919
                                           __attribute__((unused))
5960
5920
                                           gconstpointer user_data){
5961
 
#ifndef __amd64__
5962
 
  g_test_skip("Skipping EMSGSIZE test on non-AMD64 platform");
5963
 
#else
5964
5921
  __attribute__((cleanup(cleanup_close)))
5965
5922
    const int epoll_fd = epoll_create1(EPOLL_CLOEXEC);
5966
5923
  g_assert_cmpint(epoll_fd, >=, 0);
6019
5976
  g_assert_cmpuint((unsigned int)queue->length, ==, 0);
6020
5977
  g_assert_true(string_set_contains(cancelled_filenames,
6021
5978
                                    question_filename));
6022
 
#endif
6023
5979
}
6024
5980
 
6025
5981
static void test_send_password_to_socket_retry(__attribute__((unused))
7906
7862
  test_add("/parse_arguments/mixed", test_parse_arguments_mixed);
7907
7863
  test_add("/queue/create", test_create_queue);
7908
7864
  test_add("/queue/add", test_add_to_queue);
7909
 
  test_add("/queue/add/overflow", test_add_to_queue_overflow);
7910
7865
  test_add("/queue/has_question/empty",
7911
7866
           test_queue_has_question_empty);
7912
7867
  test_add("/queue/has_question/false",